Hedy Lamarr (; born Hedwig Eva Maria Kiesler; November 9, 1914 January 19, 2000) was an Austrian and American actress and inventor. Regarded as a successful film star, she also co-invented a radio guidance system during World War II.
After a brief early film career in Czechoslovakia, including the controversial erotic romantic drama Ecstasy (1933), she fled from her first husband, Friedrich Mandl, and secretly moved to Paris. Traveling to London, she met Louis B. Mayer, who offered her a film contract in Hollywood. Lamarr became a film star with her performance in the romantic drama Algiers (1938). She achieved further success with the Western Boom Town (1940) and the drama White Cargo (1942). Lamarr's most successful film was the religious epic Samson and Delilah (1949). She also acted on television before the release of her final film in 1958. She was honored with a star on the Hollywood Walk of Fame in 1960.
At the beginning of World War II, along with composer George Antheil, Lamarr co-invented a radio guidance system for Allied torpedoes that used spread spectrum and frequency hopping technology to defeat the threat of radio jamming by the Axis powers. This approach, conceptualized as a "Secret Communication System", was intended to provide secure, jam-resistant communication for weapon guidance by spreading the signal across multiple frequencies. Similar technology was used in operational systems only beginning in 1962, which was well after World War II and three years after the expiry of the Lamarr–Antheil patent. Frequency hopping, which existed and was utilized before the Lamarr–Antheil patent, is a foundational technology for spread spectrum communications. Its principles are utilized for secure wireless networking, including Bluetooth and early versions of Wi-Fi, which use variants of spread spectrum to protect data from interception and interference.
Early life
Lamarr was born Hedwig Eva Maria Kiesler in 1914 in Vienna, the only child of Gertrud "Trude" Kiesler (née Lichtwitz) and Emil Kiesler.
Her father was born to a Galician-Jewish family in Lemberg in the Kingdom of Galicia and Lodomeria, part of Austria-Hungary (now Lviv in Ukraine) and was, in the 1920s, deputy director of Wiener Bankverein, and at the end of his life a director at the united Creditanstalt-Bankverein. Her mother, a pianist and a native of Budapest, in the Kingdom of Hungary, had come from an upper-class Hungarian-Jewish family. She had converted to Catholicism and was described as a "practicing Christian" who raised her daughter as a Christian, although Hedy was not baptized at the time.
Film career
Europe
Lamarr was taking acting classes in Vienna when one day, she forged a note from her mother and went to Sascha-Film and was able to have herself hired as a script girl. While there, she had a role as an extra in the romantic comedy Money on the Street (1930), and then a small speaking part in the comedy Storm in a Water Glass (1931). Producer Max Reinhardt then cast her in a play entitled The Weaker Sex, which was performed at the Theater in der Josefstadt. Reinhardt was so impressed with her that he brought her with him back to Berlin.
However, she never actually trained with Reinhardt or appeared in any of his Berlin productions. Instead, she met the Russian theatre producer Alexis Granowsky, who cast her in his film directorial debut, The Trunks of Mr. O.F. (1931), starring Walter Abel and Peter Lorre. Granowsky soon moved to Paris, but Lamarr stayed in Berlin and was given the lead role in No Money Needed (1932), a comedy directed by Carl Boese. Lamarr then starred in the film which made her internationally famous.
Ecstasy
thumb|left|Lamarr in a 1934 publicity photo with the name "Heddie Kietzler"
In early 1933 at age 18, Lamarr was given the lead in Gustav Machatý's film Ecstasy (Ekstase in German, Extase in Czech). She played the neglected young wife of an indifferent older man.
The film became both celebrated and notorious for showing Lamarr's face in the throes of orgasm as well as close-up and brief scenes of nudity. Lamarr claimed she was "duped" by the director and producer, who used high-power telephoto lenses, although the director contested her claims.